The complete mitochondrial genome of a tropical sea cucumber, Holothuria leucospilota

Chuhang Cheng; Zonghe Yu; Chunhua Ren; Xiao Jiang; Xin Zhang; Xiaofen Wu; Wen Huang; Chaoqun Hu

doi:10.1080/23802359.2019.1668309

The complete mitochondrial genome of a tropical sea cucumber, Holothuria leucospilota

Mitochondrial DNA B Resour. 2019 Sep 19;4(2):3118-3119. doi: 10.1080/23802359.2019.1668309.

Authors

Chuhang Cheng^{1

2}, Zonghe Yu^{1

3}, Chunhua Ren¹, Xiao Jiang¹, Xin Zhang^{1

2}, Xiaofen Wu^{1

2}, Wen Huang^{1

3}, Chaoqun Hu^{1

3}

Affiliations

¹ CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB)/Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou China.
² University of Chinese Academy of Sciences, Beijing, China.
³ Institution of South China Sea Ecology and Environmental Engineering (ISEE), Chinese Academy of Sciences, Guangzhou, China.

Abstract

The mitochondrial genome of Holothuria leucospilota was 15,906 bp in length, containing 13 protein-coding genes (PCGs), 22 tRNA genes, and two rRNA genes. There were four initiation codons (ATG, ATT, ATC, and ATA) for the PCGs, and the termination codon of most PCGs was TAA, except for nad4 (TAG) and nad6 (TAG). Only one PCG (nad6) and five tRNA genes (tRNA^Ser(UCN) , tRNA^Gln , tRNA^Ala , RNA^Val , and tRNA^Asp ) were encoded on the light chain; the other genes were encoded on the heavy chain. H. leucospilota was most closely related to Holothuria scabra in a phylogenetic tree.

Keywords: Holothuria leucospilota; Mitochondrial genome; PCGs; phylogenetic tree.